//
// Atlys_LED_int.c
//
// AltysボードのLEDを1秒ごとに+1するソフトウェア
// FITの割り込みを使用する
//
#define GPO1_ADDR 0x80000010
#define GPI1_ADDR 0x80000020
#define IRQ_ENABLE 0x80000038
#define IRQ_ACK 0x8000003C
#define FIT1_INTERRUPT_BIT 0x80 // FIT1の割り込みビット位置
volatile int interrupt = 0;
//割り込み処理
void interrupt_handler() __attribute__ ((interrupt_handler));
void interrupt_handler() {
interrupt = 1;
*(volatile unsigned int *)(IRQ_ACK) = FIT1_INTERRUPT_BIT;
}
//割り込み許可
void microblaze_enable_interrupts()
{
__asm__(
"mfs r12, rmsr\n\t" //Read the MSR register
"ori r12, r12, 2\n\t" //Set the interrupt enable bit
"mts rmsr, r12\n\t" //Save the MSR register
);
}
//割り込み禁止
void microblaze_disable_interrupts()
{
__asm__(
"mfs r12, rmsr\n\t" //Read the MSR register
"andi r12, r12, ~2\n\t" //Clear the interrupt enable bit
"mts rmsr, r12\n\t" //Save the MSR register
);
}
int main()
{
unsigned int led = 0x55;
*(volatile unsigned int *)(GPO1_ADDR) = led;
microblaze_enable_interrupts();
*(volatile unsigned int *)(IRQ_ENABLE) = FIT1_INTERRUPT_BIT;
while(1){
// FIT割り込み待ち
interrupt = 0;
while(interrupt==0);
*(volatile unsigned int *)(GPO1_ADDR) = led++;
}
}
TARGET=Atlys_LED_int.elf
TARGET_DEBUG=Atlys_LED_int_debug.elf
SRCDIR=./
OBJDIR=./
SRCS= $(SRCDIR)Atlys_LED_int.c
OBJS= $(OBJDIR)Atlys_LED_int.o
OBJS_DEBUG= $(OBJDIR)Atlys_LED_int_debug.o
CC=mb-gcc
CFLAGS=-O2 -mlittle-endian -Wl,-Map=Atlys_LED_int.map
CFLAGS_DEBUG=-O0 -g -mlittle-endian -Wl,-Map=Atlys_LED_int_debug.map
LDFLAGS1=-Wl,-s
$(TARGET) : $(OBJS)
$(CC) $(CFLAGS) $(LDFLAGS1) $(OBJS) -o $(OBJDIR)$(TARGET) $(LDFLAGS2)
$(OBJDIR)Atlys_LED_int.o: $(SRCDIR)Atlys_LED_int.c $(INCS)
$(CC) $(CFLAGS) -c $< -o $@
clean:
rm -f $(OBJDIR)*.elf $(OBJDIR)*.o $(OBJDIR)*.map
debug: $(TARGET_DEBUG)
$(TARGET_DEBUG) : $(OBJS_DEBUG)
$(CC) $(CFLAGS_DEBUG) $(OBJS_DEBUG) -o $(OBJDIR)$(TARGET_DEBUG) $(LDFLAGS2)
$(OBJDIR)Atlys_LED_int_debug.o: $(SRCDIR)Atlys_LED_int.c $(INCS)
$(CC) $(CFLAGS_DEBUG) -c $< -o $@
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